#include <iostream>
#include <cstring>
using namespace std;

int main()
{
    char ch1[10] = "abcdef";
    char ch2[] = "abcdef";
    cout << ch2 << endl;
    char ch3[10] = {'a','b','c','d','e','f'};
    char ch4[] = {'a','b','c','d','e','f'};
    cout << ch4 << endl;
    cout << strlen(ch4) << endl;
    return 0;
}